Quimica Analitica Cuantitativa (often referred to simply as "Vogel") is the Spanish translation of one of the most authoritative and enduring textbooks in analytical chemistry: .
Ana employed various quantitative analytical techniques to determine the concentrations of potential contaminants in the water samples. She used titration methods, such as acid-base and complexometric titrations, to quantify the amounts of substances like heavy metals, nitrates, and chlorides. She also applied spectroscopic techniques, like atomic absorption spectroscopy (AAS) and ultraviolet-visible (UV-Vis) spectroscopy, to detect and quantify other pollutants.